Operational plan for Marikina watershed preservation 1995 

 - Manila :  Planning Resources Operations Systems ,  c1995 
 - various paging ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Watershed management--Philippines.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Marikina watershed preservation area.